Wall-cooler for furnaces.



L. KNOX.

Patemed Bec.

3 SHEET SHEET 5.

INVEETOR :6 a. WW QNWMK L. L. KNOX.

WALL COOLER FOR FURNACES.

APPLICATION FILED APR. 3. l9l8.

3 SHEETSSHEET 2.

I E lllll 3 WITNESSES INVENTOR 4. I m M. 1 a 01m.

L L. KNOX.

WALL COOLER FOR FURNACES.

APPLICATION man APR.3. 1918.

Patented Dec. 24,

3 SHEEISSHEET 3.

X). QW

WITNESSES TTNTTED %TATE% PATENT @FFTTGE.

LUTHER L. KNOX, 015 BELLETTUE, PENNSYLVANIA, ASSIGNOR TO BLAW-KNOX COM- PANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

WALL-COOLER FOR FURNACES.

Specification of Letters Patent.

Patented Dec. 241, 19118.

T 0 all whom it may concern:

Be it known that I, LUTHER L. KNOX, residing at Bellevue, Allegheny county, Pennsylvania, have invented a new and useful Improvement in VVall-Coolers for Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure I is a longitudinal vertical section of one end portion of an open-hearth furnace having my invention applied thereto;

Fig. 2 is a transverse vertical section through the hearth portion of an openhearth furnace showing the application thereto of one'form of my improved wall coolers;

Fig. 3 is a plan View with one corner portion in section of one of the coolers shown in Fig. 1;

Fig. 4 is a section on the line IV-TV of Fig. 3;

Fig. 5 is a similar section showing a modification; 1

Fig. 6 is a front elevation showing a plurality of coolers;

Fig. 7 is a view similar to Fig. 4, but showing a modification;

Fig. 8 is a view similar to Fig. 3, showing another modification; and

Fig. 9 is a transverse vertical section on the line IXTX of Fig. 8.

My invention has relation to coolers for furnace walls, and is designed to provide coolers which can be readily manufactured and put in place and which provide for an effective circulation of a cooling fluid within a furnace wall. My invention also provides coolers in which the water may be repeatedly used in successive coolers.

Referring first to that form of my invention shown in Figs. 1, 3, 4, 5 and 6, the numeral 2 designates a gas uptake of an openhearth furnace, 3 the gas port, 4 the air port, 5 the bulkhead wallof the gas port, and 6 the hearth portion of the furnace. The bulkhead wall 5 inFig. l is shown as provided with a plurality of coolers arranged one above another, each of these coolers consisting of a tapered or wedge-shaped portion 7, which extends horizontally into and preferably through the major portion of the thickness of the wall, and which at its outer end opens into the funnel-shaped portion 8, which is outside of the wall 5. The upper cooler of the vertical series of coolers shown in Figs. 1 and (3 may receive a supply of water from any suitable source, such as the pipe 9, which is arranged to discharge into the open-top funnel portion 8. Each cooler is provided with an overflow pipe 10, leading downwardly through the bottom wall of said portion and arranged to discharge into the corresponding portion of the cooler next below it.

It will be noted that by reason of the opentop exterior extensions of the coolers, a considerable portion of the body of water contained therein is exposed on its surface to the atmosphere. This, together with the heat which will ,be conducted through the walls of such extensions to the air and the cooling which will take place as the water falls from the overflow discharge of one cooler into the next cooler, keeps the temwill be plugged up, asindicated at 11 in Fig. 6.

The second cooler from the top of the plurality of coolers shown in Figs. 1, 5 and 6 is preferably cut away at the central portion, as indicated at 12, this being for the purpose of more readily permitting a hole to be punched through the bulkhead wall just above this cooler, in case it is necessary to introduce a poker into the port 3, as is sometimes required. This cooler is shown as having both of its overflow connections 10 unplugged. I preferably form the coolers of sheet metal, the joints of which are welded so as to avoid the use of rivets, the sheet metal being able to withstand the expansion and contraction stresses better than castings. When formed of sheet metal, the bottom walls may be provided with the couplings 13, welded therein and having suitable sockets to receive the entrance and exit portions of the overflow pipes.

The form of my invention shown in Fig. 7 is the same as that just described, with the exception that T have shown the cooler as provided with an internal bafile plate 14, having one .part extending within the portion 7 of the cooler and another part extending upwardlv within the open funnel portion 8". It will, of course, be understood that the coolers ma be made of any desired size, and that two or more series of these coolers may be used side by side as may be desirable.

In Fig. 2, I have shown my invention applied to the cooling of the side walls 15 of an o ien-hearth' furnace. The coolers here shown are similar to the coolers first described, but are shown as beingof somewhat different shape. Each of them has a portion 16, which extends within the furnace wall and an outer open-top portion 17, lying outside the furnace wall. The portion 17, instead of being funnel-shaped, is shown as being generally rectangular with a rounded front wall 18, and is shown as being of less length than the portion 16. Each of these coolers is provided with an overflow pipe 19. which is similar to the overflows before described. 20 designates suitable spacers or stays which may be placed within the portions 16. These coolers are arranged side by side, as indicated in dotted lines in Fig. 1,. and while I have only shown one tier or row of these coolers, it will be understood that as many tiers or rows may be employed, one above another,

as may be desirable in any particular case,

The coolers may be made in various sizes so as to enable them to be readily used between furnace doors or other breaks or obstructions in the furnace walls. It will be obvious that so long as they embody the novel features pointed out in the appended claims, they may be of various shapes other than those specifically shown and described.

Inasmuch, however, as the coolers are designed to be inserted or built into the vertical walls-of furnaces, they should be relatively short, measured in the direction of the thickness of such walls, and should be relatively wide measured in the direction of the length of the wall, this latter dimension being considerably greater than the former one.

' I claim:

1. A cooler for furnace walls, consisting of a hollow metal structure having a closed portion adapted to extend within a furnace wall to be cooled an open top portion of greater depth than the closed portion and adapted to lie outside of said wall. and an overflow pipe having its outlet at a point above the level of the top wall of said closed portion, said structure being short in the direction of the thickness of the wall in which it is to be inserted so that its closed portion may be contained in said wall, and of a width, measured in the direction of the length of said wall, greater than its said length; substantially as described.

2. A cooler for furnace walls, consisting of a hollow metal structure having a closed portion adapted to extend within a furnace wallto be cooled, an pen top portion of greater depth than the closed portion and adapted to lie outside of said wall, and an overflow pipe having its outlet at a point above the level of the top wall of said closed portion, together with a battle means lying within both of said portions and which is arranged to direct water entering the open top portion at one side thereof downwardly and inwardly to the inner end portion of the closed portion and thence upwardly and outwardly to the said overflow; substantially as described.

3. A cooler for furnace Walls, comprising a hollow metal structure having a closed top portion adapted to extend within a wall to be cooled, and an open top portion adapted.

to be outside of said wall and having an overflow, together with interior bafiling means for causing a circulation of water from within the open portion to the inner end of the closed portion and thence back to the overflow; substantially as described.

4.. A cooler for furnace walls, comprising a closed portion adapted to extend within the wall to be cooled and an open-top portion adapted to extend exteriorly of said wall, the open-top portion being of greater depth than the closed portion, and an overflow pipe extending through the bottom of the open-top portion and upwardly within the same to a level above the level of the top wall of the closed portion, substantially as described.

In testimony whereof, I have hereunto set my hand.

LUTHER L. KNOX; 

